NDLI: Transmit Antenna Selection Based on Link-layer Channel Probing

Content Provider	IEEE Xplore Digital Library
Author	Cheng, Chen-Mou Hsiao, Pai-Hsiang Kung, H. T. Vlah, Dario
Copyright Year	2007
Description	Author affiliation: Harvard University, Cambridge, MA 02138, htk@eecs.harvard.edu (Kung, H. T.) \|\| Harvard University, Cambridge, MA 02138, doug@eecs.harvard.edu (Cheng, Chen-Mou) \|\| Harvard University, Cambridge, MA 02138, shawn@eecs.harvard.edu (Hsiao, Pai-Hsiang) \|\| Harvard University, Cambridge, MA 02138, dario@eecs.harvard.edu (Vlah, Dario)
Abstract	In this paper, we propose transmit antenna selection based on receiver feedback of channel information obtained via link-layer probing. Furthermore, we report the performance gain of the proposed antenna selection scheme in an experimental multi-antenna 802.11 network. We built a low-altitude Unmanned Aerial Vehicle (UAV) testbed using commodity dual-antenna 802.11 hardware and performed field experiments to collect traces of link performance using antennas of various types and orientations. Based on the collected traces, we demonstrate that transmit antenna selection can achieve a significant amount of gain using a link-layer channel probing protocol at a relatively low probing rate. The largest improvement we observed with joint transmit/receive antenna selection in 2x2 systems was 32%, about twice as much as that of receive-only antenna selection in 1x2 systems, which achieved 17%. Moreover, a similar improvement is obtained with probing intervals up to about 200 milliseconds, which is infrequently enough to consume only a small fraction of the available 802.11 channel capacity. Since these results require only a low implementation and operational cost, we conclude that transmit antenna selection is a worthwhile technique to use with the kind of multi-antenna mobile ad-hoc networks we examined.
Starting Page	1
Ending Page	6
File Size	6278169
Page Count	6
File Format	PDF
ISBN	9781424409921
DOI	10.1109/WOWMOM.2007.4351703
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-18
Publisher Place	Finland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation Protocols Transmitting antennas Feedback Receiving antennas Performance gain Antenna feeds Unmanned aerial vehicles Hardware Testing
Content Type	Text
Resource Type	Article

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